[U-Boot] [PATCH] imx: imx7d: fix ahb clock mux 1

[U-Boot] [PATCH] imx: imx7d: fix ahb clock mux 1

[Stefan Agner]

The clock parent of the AHB root clock when using mux option 1
is the SYS PLL 270MHz clock. This is specified in  Table 5-11
Clock Root Table of the i.MX 7Dual Applications Processor
Reference Manual.

While it could be a documentation error, the 270MHz parent is
also mentioned in the boot ROM configuration in Table 6-28: The
clock is by default at 135MHz due to a POST_PODF value of 1
(=> divider of 2).

Signed-off-by: Stefan Agner <stefan@agner.ch>
---
I sent a similar fix to the LKML which has been merged some days
ago:
https://lkml.org/lkml/2016/4/28/767

--
Stefan

 arch/arm/cpu/armv7/mx7/clock_slice.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/cpu/armv7/mx7/clock_slice.c b/arch/arm/cpu/armv7/mx7/clock_slice.c
index ad5d504..1665df9 100644
--- a/arch/arm/cpu/armv7/mx7/clock_slice.c
+++ b/arch/arm/cpu/armv7/mx7/clock_slice.c
@@ -55,7 +55,7 @@ static struct clk_root_map root_array[] = {
 	  PLL_ENET_MAIN_250M_CLK, PLL_AUDIO_MAIN_CLK}
 	},
 	{AHB_CLK_ROOT, CCM_AHB_CHANNEL,
-	 {OSC_24M_CLK, PLL_SYS_PFD2_135M_CLK, PLL_DRAM_MAIN_533M_CLK,
+	 {OSC_24M_CLK, PLL_SYS_PFD2_270M_CLK, PLL_DRAM_MAIN_533M_CLK,
 	  PLL_SYS_PFD0_392M_CLK, PLL_ENET_MAIN_125M_CLK, PLL_USB_MAIN_480M_CLK,
 	  PLL_AUDIO_MAIN_CLK, PLL_VIDEO_MAIN_CLK}
 	},
-- 
2.8.2

[U-Boot] [PATCH] imx: imx7d: fix ahb clock mux 1

[Stefano Babic]

On 05/05/2016 22:42, Stefan Agner wrote:
> The clock parent of the AHB root clock when using mux option 1
> is the SYS PLL 270MHz clock. This is specified in  Table 5-11
> Clock Root Table of the i.MX 7Dual Applications Processor
> Reference Manual.
> 
> While it could be a documentation error, the 270MHz parent is
> also mentioned in the boot ROM configuration in Table 6-28: The
> clock is by default at 135MHz due to a POST_PODF value of 1
> (=> divider of 2).
> 
> Signed-off-by: Stefan Agner <stefan@agner.ch>
> ---
> I sent a similar fix to the LKML which has been merged some days
> ago:
> https://lkml.org/lkml/2016/4/28/767

Thanks for porting this to U-Boot, too.

> 
> --
> Stefan
> 
>  arch/arm/cpu/armv7/mx7/clock_slice.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/cpu/armv7/mx7/clock_slice.c b/arch/arm/cpu/armv7/mx7/clock_slice.c
> index ad5d504..1665df9 100644
> --- a/arch/arm/cpu/armv7/mx7/clock_slice.c
> +++ b/arch/arm/cpu/armv7/mx7/clock_slice.c
> @@ -55,7 +55,7 @@ static struct clk_root_map root_array[] = {
>  	  PLL_ENET_MAIN_250M_CLK, PLL_AUDIO_MAIN_CLK}
>  	},
>  	{AHB_CLK_ROOT, CCM_AHB_CHANNEL,
> -	 {OSC_24M_CLK, PLL_SYS_PFD2_135M_CLK, PLL_DRAM_MAIN_533M_CLK,
> +	 {OSC_24M_CLK, PLL_SYS_PFD2_270M_CLK, PLL_DRAM_MAIN_533M_CLK,
>  	  PLL_SYS_PFD0_392M_CLK, PLL_ENET_MAIN_125M_CLK, PLL_USB_MAIN_480M_CLK,
>  	  PLL_AUDIO_MAIN_CLK, PLL_VIDEO_MAIN_CLK}
>  	},
> 

Applied to -next, thanks !

Best regards,
Stefano Babic


-- 
=====================================================================
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================